| Boston Acoustics M25 Loudspeaker Review |
| Home Theater Loudspeakers Bookshelf/Monitor Loudspeakers | |
| Written by Andre Marc | |
| Wednesday, 24 October 2012 | |
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Boston Acoustics was founded in 1979 and quickly made a name among budget audiophiles, and later home theater enthusiasts. They became a big player in car audio as well. In 2005, D&M Holdings -- the parent company for Marantz, Denon and, up until a few weeks ago, McIntosh -- purchased Boston Acoustics. For a few years, Boston Acoustics was admittedly off the high-end radar, but in 2012, the company made a big push with a brand new line of products.
The Boston Acoustics engineering team is based out of Peabody, Massachusetts, and they called upon independent German designer, Karl-Heinz Fink, and Ken Ishiwata of Marantz. Ishiwata is an absolute legend, having designed some of the best sounding components Marantz has ever developed. When I heard he was involved in the development of the new Boston Acoustics line, I was enthralled. I reviewed several products he has designed, including the utterly superb SA-15S2B Limited Edition SACD player. When the offer came to review one of the new speakers, I jumped. I received the M25 two way monitors, which retail for $399 each, or to round it off, $800 a pair. Stuffed with proprietary technology and interesting design touches, the M25 features a 1” Extended Wide Bandwidth type dome tweeter coupled with a 5.25” woofer. Boston Acoustics also developed a technology, dubbed Lo-Q, to reduce cabinet vibrations and tame resonances. The M25 is rear ported, with one set of quality binding posts. The overall build quality is very impressive. These do not look or feel like “budget” speakers in any way. The front baffle is fitted with a leatherette of sorts, and my review samples arrived in a very nice high gloss black finish. M25s are not very big, at around 12.5” tall and roughly 10”deep, but they weigh almost 15 lbs each. They come with a soft fabric grill that Boston says is sonically transparent. I left them off most of the time, as I liked the look of the speaker with the drivers exposed. The M Series also includes three floorstanders, a center channel, a surround, and a subwooofer. Set Up & Listening: I set up the M25s on a pair of 26” Sound Anchors stands where my Harbeth Compact 7ES3s usually sit, with QED Genesis Silver Spiral speaker cable terminated with banana plugs. I used both a pair of Peachtree Audio separates and my McIntosh MA6600 integrated amplifier. Toe-in was roughly 20 degrees, with roughly 3 feet of space around all surfaces. Determined to run the M25s through their paces with as many different types of music as possible, I started with Swept Away, the new album from bassist Marc Johnson and pianist Elaine Elias on the legendary ECM label. A tonally pure recording, the performances are elegant and the M25 passed this first test with flying colors. The acoustic bass was woody in tone, precise in attack, and the piano notes rang out bell-like, with the percussive effect one hears from a live piano. This was a very good start indeed. Shifting gears, I called up a new recording of a live collaboration between banjo virtuoso American Bela Fleck, and legendary Malian singer Oumou Sangare. Odd as this may seem, it is a rather natural match up, as the banjo is similar to the African instrument, the kora, and Fleck has performed virtually every type of American music, many which have their roots in Africa. The M25 allowed the majesty of Sangare’s vocals, Fleck’s complimentary support, and the backing band to each have their own space, and yet to gel as one. ![]() U2's 2001 masterwork, All That You Can’t Leave Behind, is filled with tracks featuring rumbling bass guitar, like “Elevation”, Beautiful Day”, and “New York”. Through the M25, these songs sounded exciting with an excellent sense of momentum and drive. It really takes a well-designed speaker to offer dynamics, natural excitement, and delicacy and nuance. That is what you have here with the M25. The only caveat I would offer for the M25 is that at 4 Ohms, and 86 Db rated sensitivity, they did require a good bit of amplifier power to get them going. I had on hand a Peachtree220 amplifier rated 200 wpc, and my McIntosh MA6600 offers up 250 wpc. They were more than sufficient. I would be wary of matching up the M25 with low powered amps, and would say 75 wpc and up would get the job done. Of course, amplifier and speaker match ups are always difficult to call, but this was my own experience.
![]() Conclusion: The M25 are my new benchmark for sub $1000 two-way monitors. I can’t recommend them for an audition highly enough. The best part about reviewing is hearing what talented audio designers can do at the lower price points, especially in speakers. The coherence, overall neutrality, and workmanship put it ahead of the pack for me. At $800 a pair, they are a steal. The amount of musical enjoyment per dollar is off the charts. The fact is I was able to partner the M25 with much more expensive electronics without any weaknesses being revealed. I now hope to review of one of the floorstanders in the M line. Hats of to Ken Ishiwata and the rest of the Boston Acoustics design team. The M25 is a great achievement. SpecificationsBoston Acoustics M25 loudspeaker: $399 (Each) www.bostonacoustics.com Nominal Impedance:4(3.6) ohms Woofers: 1" EWB dome tweeter, 5 1/4" woofer High-Frequency Driver 1" (2.5 cm) EWB dome Recommended Amplifier Power: 50 - 200 watts Sensitivity (1 watt (2.83v) at 1m): 86 dB Frequency Response (+- 3dB): 62Hz - 30KHz Review System 1CD Transport: Musical Fidelity M1 CDT Server: Squeezebox Touch w/ CIA VDC-SB power supply via Ethernet to MAC Mini w/ Western Digital & Seagate external drives. DAC: Bryston BDA-1 Headphone Amp: Pro-Ject Head Box II Headphones: Grado SR60 Preamp: Audio Research SP16 Amplifier: Audio Research VS55 Speaker: Thiel CS2.4, Opera Seconda Cables: Stager Silver Solids, Kimber KCTG (IC), Transparent MM2 Super (IC), Transparent Plus (Speaker) Acoustic Zen Tsunami II (AC),Transparent (AC).Shunyata Venom (AC) Element Cable Red Storm (Digital AC), DH Labs TosLink, DH Labs AES/EBU, Belkin Gold (USB) DH Labs (USB) Accessories: Symposium Rollerblocks, Shakti Stone, Audience Adept Response aR6 power conditioner,Salamander rack Review System 2CD Player: Marantz 5003 Music Server: Squeezebox Touch via Ethernet to MAC Mini w/ Western Digital & Seagate external drives. DAC: Musical Fidelity V-DAC II Preamp: Peachtree NovaPre Power Amp: Peachtree220 Integrated Amplifier: McIntosh MA6600 Tape Deck: Revox A77 Speaker: Harbeth Compact 7ES3 Cables: Kimber Hero HB, DH Labs White Lightning (IC),QED Genisis Silver Spiral (Speaker),PS Audio (AC), Pangea Audio (AC), DH Labs TosLink, Audioquest Forest USB, Wireworld Ultraviolet USB Accessories:Cable Pro Noisetrapper, Sound Anchors Stands, Wiremold
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